2,2'-(2-methylpropylidene)bis[4,6-xylenol]

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

25 July 2016 to 26 August 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.1: “Melting/Freezing Temperature”, Official Journal of the European Union no. L142, May 31, 2008.

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no. 102: "Melting Point / Melting Range", July 27, 1995.

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Version / remarks:

United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7200: "Melting Point/Melting Range", March 1998.

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

No further details specified

Key result

Melting / freezing pt.:

162 °C

Atm. press.:

1 013.25 hPa

Decomposition:

no

Sublimation:

no

Preliminary test

At approximately 70°C a mechanical shock was observed. This did not influence the measurement. From 200°C upwards the weight of the sample decreased significantly. At 272°C the sample weight had decreased by 25%.

After the experiment no test item was observed in the sample container.

 

Main study

One minor and one major endothermic peak between 125°C and 175°C were observed. The extrapolated onset temperature of the minor peak was 149.39°C. This signal was most probably linked to the presence of an impurity or another crystallographic species. The extrapolated onset temperature of the major peak was 162.17°C. Both effects were most likely obtained due to melting.

To investigate the melting peaks between 125°C and 175°C a repeated heating cycle was applied in the Experiment 2. A closed sample container was applied to investigate the endothermic peak between 250°C and 325°C.

With the first heating the extrapolated onset temperature of the melting peak was 149.39°C. The extrapolated onset temperature of the second peak was 162.29°C.

During cooling no effects were observed which were due to crystallization of the test item (results are archived in the raw data).

During the second heating a glass transition was observed between 25°C and 50°C. The inflection point of the glass transition was 40.53°C. An exothermic peak was observed between 50°C and 125°C. The effect was obtained due to cold crystallization of the test item.

The extrapolated onset temperature of the first (minor) melting peak was 159.82°C. The peak maximum of the second (major) melting peak was 163.85°C. The extrapolated onset and the peak maximum were not used for calculating the melting temperature, since it was obtained by melting of non-original test item.

The melting temperature was determined as the average melting temperature obtained from experiment 1 (162.17°C) and experiment 2 (162.29°C).

Conclusions:

The melting temperature of Lowinox® 22IB46 was determined at 162°C (435K) using DSC.

Executive summary:

The purpose of the study was to determine the physico-chemical properties for Lowinox® 22IB46.

 

The melting temperature of the test item were determined using differential scanning calorimetry (DSC), in accordance with the following guidelines:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.1: “Melting/Freezing Temperature”, Official Journal of the European Union no. L142, May 31, 2008.

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no. 102: "Melting Point / Melting Range", July 27, 1995.

United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7200: "Melting Point/Melting Range", March 1998.

 

The melting temperature of Lowinox® 22IB46 was determined at 162°C (435K) using DSC.

Description of key information

Key value determined in a GLP accredited laboratory study using DSC in accordance with EU Method A.1, OECD Guideline 102 and US EPA Procedure OPPT 830.7200.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

162 °C